I'm using a utensil container for my acrylic pour paints and my canvas is 14 x 18 inches. My acrylic paints are different shades of blue premixed with Sargent Art Gloss Medium and water.

Primed canvas accepts the paint more easily. Gesso and acrylic primer come in jars, tubes, squeezable bottles or spray cans. Different primers give canvases different surface textures: ...